PASSED Manual Testing using the following steps:
1. Deploy calendar-portlet plugin.
2. Add Calendar portlet.
3. Add an event for Test.
4. Click the Edit Details of the event.
5. Open the Invitations section.
6. Invite guest to this event.
6. The "Guest" will appear under Pending, click the dropdown and click Check Availability.
7. The scheduler will show up, user can drag the event to other time.

Ginson Ren
added a comment - 13/Dec/12 11:03 PM PASSED Manual Testing using the following steps:
1. Deploy calendar-portlet plugin.
2. Add Calendar portlet.
3. Add an event for Test.
4. Click the Edit Details of the event.
5. Open the Invitations section.
6. Invite guest to this event.
6. The "Guest" will appear under Pending, click the dropdown and click Check Availability.
7. The scheduler will show up, user can drag the event to other time.
Reproduced on:
Tomcat 7.0 + MySQL 5. Portal 6.2.x GIT ID: ca4dc3e7f5460136725c74fa4908cccc82e5b76b.
Plugins 6.2.x EE GIT ID: c0cd8496159c7284eaed6a3428a7450550c20bc6.
If user drag the event to left, the Start Date and End Date on the top will change as the drag dot. If the user drag the event to right, the Start Date and End Date on the top will not change.
Fixed on:
Tomcat 7.0 + MySQL 5. Portal 6.2.x GIT ID: 5b2d07219b09bc2f2e3488a5835d0526aa2cbe25.
Plugins 6.2.x EE GIT ID: d8be0760d1d3d14123df71417bce986d33bbfab1.
The Start Date and End Date on the top will change as the drag dot whenever user drag the event to.